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 <h1>预定义常量</h1>

 <p class="simpara">下列常量由此扩展定义，且仅在此扩展编译入 PHP 或在运行时动态载入时可用。</p>
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   <dt>

    <strong><code>DIRECTORY_SEPARATOR</code></strong>
     (<span class="type"><a href="language.types.string.html" class="type string">string</a></span>)
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    <strong><code>PATH_SEPARATOR</code></strong>
     (<span class="type"><a href="language.types.string.html" class="type string">string</a></span>)
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 <blockquote class="note"><p><strong class="note">Note</strong>: 
  <span class="simpara">
   <strong><code>PATH_SEPARATOR</code></strong> 是在 PHP 4.3.0-RC2 中引入。
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